diff --git a/shard.yml b/shard.yml
index 8787db0a..75e60809 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: ameba
-version: 0.14.1
+version: 0.14.2
 
 authors:
   - Vitalii Elenhaupt <velenhaupt@gmail.com>
diff --git a/spec/ameba/rule/style/is_a_filter_spec.cr b/spec/ameba/rule/style/is_a_filter_spec.cr
index 1413600c..a45a96ed 100644
--- a/spec/ameba/rule/style/is_a_filter_spec.cr
+++ b/spec/ameba/rule/style/is_a_filter_spec.cr
@@ -26,6 +26,15 @@ module Ameba::Rule::Style
       subject.catch(source).should_not be_valid
     end
 
+    it "does not report if there .is_a? call within block with multiple arguments" do
+      source = Source.new %(
+        t.all? { |_, v| v.is_a?(String) }
+        t.all? { |foo, bar| foo.is_a?(String) }
+        t.all? { |foo, bar| bar.is_a?(String) }
+      )
+      subject.catch(source).should be_valid
+    end
+
     context "properties" do
       it "allows to configure filter_names" do
         source = Source.new %(
diff --git a/spec/ameba/rule/style/verbose_block_spec.cr b/spec/ameba/rule/style/verbose_block_spec.cr
index f6f9b06f..f324263e 100644
--- a/spec/ameba/rule/style/verbose_block_spec.cr
+++ b/spec/ameba/rule/style/verbose_block_spec.cr
@@ -92,6 +92,7 @@ module Ameba::Rule::Style
           .catch(source).should be_valid
         rule
           .tap(&.exclude_prefix_operators = false)
+          .tap(&.exclude_operators = false)
           .catch(source).should_not be_valid
       end
 
@@ -190,7 +191,10 @@ module Ameba::Rule::Style
         (1..3).map { |i| i.in?(1, *foo, 3, **bar) }
         (1..3).join(separator: '.') { |i| i.to_s }
       )
-      subject.catch(source).should_not be_valid
+      rule = VerboseBlock.new
+      rule
+        .tap(&.exclude_operators = false)
+        .catch(source).should_not be_valid
       source.issues.size.should eq(short_block_variants.size)
 
       source.issues.each_with_index do |issue, i|
diff --git a/src/ameba/rule/performance/map_instead_of_block.cr b/src/ameba/rule/performance/map_instead_of_block.cr
index 377130fc..a00a4698 100644
--- a/src/ameba/rule/performance/map_instead_of_block.cr
+++ b/src/ameba/rule/performance/map_instead_of_block.cr
@@ -24,6 +24,7 @@ module Ameba::Rule::Performance
   # ```
   class MapInsteadOfBlock < Base
     properties do
+      enabled false
       description "Identifies usage of `join/sum/product` calls that follow `map`."
     end
 
diff --git a/src/ameba/rule/style/is_a_filter.cr b/src/ameba/rule/style/is_a_filter.cr
index 151cd2c4..6dd4a777 100644
--- a/src/ameba/rule/style/is_a_filter.cr
+++ b/src/ameba/rule/style/is_a_filter.cr
@@ -61,6 +61,7 @@ module Ameba::Rule::Style
       return unless (body = block.body).is_a?(Crystal::IsA)
       return unless (path = body.const).is_a?(Crystal::Path)
       return unless body.obj.is_a?(Crystal::Var)
+      return if block.args.size > 1
 
       name = path.names.join("::")
       name = "::#{name}" if path.global? && !body.nil_check?
diff --git a/src/ameba/rule/style/verbose_block.cr b/src/ameba/rule/style/verbose_block.cr
index 433768ca..62d52ca0 100644
--- a/src/ameba/rule/style/verbose_block.cr
+++ b/src/ameba/rule/style/verbose_block.cr
@@ -22,7 +22,7 @@ module Ameba::Rule::Style
   #   ExcludeMultipleLineBlocks: true
   #   ExcludeCallsWithBlocks: true
   #   ExcludePrefixOperators: true
-  #   ExcludeOperators: false
+  #   ExcludeOperators: true
   #   ExcludeSetters: false
   #   MaxLineLength: ~
   #   MaxLength: 50 # use ~ to disable
@@ -34,7 +34,7 @@ module Ameba::Rule::Style
       exclude_multiple_line_blocks true
       exclude_calls_with_block true
       exclude_prefix_operators true
-      exclude_operators false
+      exclude_operators true
       exclude_setters false
 
       max_line_length : Int32? = nil # 100